KHIA headerKnow-How in Action


Belzona® Improves Protection At Base Of Chimneys



Power (POWR)



Engines and Casings (ENC)


Customer Location:

Municipality, Sweden


Application Date:

September 2011


Application Situation:

Three Chimneys for furnaces.



The chimneys are made of steel and are resting on a concrete base. Moisture between the chimney and the supporting concrete resulted in corrosion taking place on the chimney as well as a high risk for frost heave in the concrete.



Belzona® 3211 (Lagseal)

Belzona® 5811 (Immersion Grade)



Steel and concrete


Application Method:

Application was carried out in accordance with Belzona Know-How System Leaflets GSS-3 and TCC-5. After grit blasting the repair area, the steel was protected with Belzona® 5811 and the Belzona® 3211 reinforced system was applied across the junction between steel and concrete.


Belzona Facts:

Belzona micro-porous Membrane systems are extenmsively used to provide weather-proofing of tank bases so as to prevent under-tank corrosion, the same arrangement and problems as found on these chimneys. The system prevents water entering whilst allowing any existing moisture to dry out.


Photographs Description

  1. Chimney Base for the furnace before the repair
  2. Application of Belzona® 3211
  3. Reinforcement sheet incorporated into the Belzona® 3211 coating bridging the steel/concrete junction
  4. The finished application with Belzona® 5811 providing corrosion protection on the steel chimney
Case study pic one


 Case study pic two


 Case study pic three


 Case study pic four


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